nvidiagpu.py: remove invalid shebang
nvidiagpu.py: remove invalid shebang

This file has no actionable code when executed directly from a shell. It contains only a `class` as it is a bumblebee module.

so the shebang should be removed.
tobi-wan-kenobi/bumblebee-status,tobi-wan-kenobi/bumblebee-status